1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * namei.c
6 *
7 * Create and rename file, directory, symlinks
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 *
11 * Portions of this code from linux/fs/ext3/dir.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/dir.c
21 *
22 * Copyright (C) 1991, 1992 Linux Torvalds
23 */
24
25 #include <linux/fs.h>
26 #include <linux/types.h>
27 #include <linux/slab.h>
28 #include <linux/highmem.h>
29 #include <linux/quotaops.h>
30 #include <linux/iversion.h>
31
32 #include <cluster/masklog.h>
33
34 #include "ocfs2.h"
35
36 #include "alloc.h"
37 #include "dcache.h"
38 #include "dir.h"
39 #include "dlmglue.h"
40 #include "extent_map.h"
41 #include "file.h"
42 #include "inode.h"
43 #include "journal.h"
44 #include "namei.h"
45 #include "suballoc.h"
46 #include "super.h"
47 #include "symlink.h"
48 #include "sysfile.h"
49 #include "uptodate.h"
50 #include "xattr.h"
51 #include "acl.h"
52 #include "ocfs2_trace.h"
53
54 #include "buffer_head_io.h"
55
56 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
57 struct inode *dir,
58 struct inode *inode,
59 dev_t dev,
60 struct buffer_head **new_fe_bh,
61 struct buffer_head *parent_fe_bh,
62 handle_t *handle,
63 struct ocfs2_alloc_context *inode_ac);
64
65 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
66 struct inode **ret_orphan_dir,
67 u64 blkno,
68 char *name,
69 struct ocfs2_dir_lookup_result *lookup,
70 bool dio);
71
72 static int ocfs2_orphan_add(struct ocfs2_super *osb,
73 handle_t *handle,
74 struct inode *inode,
75 struct buffer_head *fe_bh,
76 char *name,
77 struct ocfs2_dir_lookup_result *lookup,
78 struct inode *orphan_dir_inode,
79 bool dio);
80
81 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
82 handle_t *handle,
83 struct inode *inode,
84 const char *symname);
85
86 static int ocfs2_double_lock(struct ocfs2_super *osb,
87 struct buffer_head **bh1,
88 struct inode *inode1,
89 struct buffer_head **bh2,
90 struct inode *inode2,
91 int rename);
92
93 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
94 /* An orphan dir name is an 8 byte value, printed as a hex string */
95 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
96
ocfs2_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)97 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
98 unsigned int flags)
99 {
100 int status;
101 u64 blkno;
102 struct inode *inode = NULL;
103 struct dentry *ret;
104 struct ocfs2_inode_info *oi;
105
106 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
107 dentry->d_name.name,
108 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
109
110 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
111 ret = ERR_PTR(-ENAMETOOLONG);
112 goto bail;
113 }
114
115 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
116 if (status < 0) {
117 if (status != -ENOENT)
118 mlog_errno(status);
119 ret = ERR_PTR(status);
120 goto bail;
121 }
122
123 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
124 dentry->d_name.len, &blkno);
125 if (status < 0)
126 goto bail_add;
127
128 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
129 if (IS_ERR(inode)) {
130 ret = ERR_PTR(-EACCES);
131 goto bail_unlock;
132 }
133
134 oi = OCFS2_I(inode);
135 /* Clear any orphaned state... If we were able to look up the
136 * inode from a directory, it certainly can't be orphaned. We
137 * might have the bad state from a node which intended to
138 * orphan this inode but crashed before it could commit the
139 * unlink. */
140 spin_lock(&oi->ip_lock);
141 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
142 spin_unlock(&oi->ip_lock);
143
144 bail_add:
145 ret = d_splice_alias(inode, dentry);
146
147 if (inode) {
148 /*
149 * If d_splice_alias() finds a DCACHE_DISCONNECTED
150 * dentry, it will d_move() it on top of ourse. The
151 * return value will indicate this however, so in
152 * those cases, we switch them around for the locking
153 * code.
154 *
155 * NOTE: This dentry already has ->d_op set from
156 * ocfs2_get_parent() and ocfs2_get_dentry()
157 */
158 if (!IS_ERR_OR_NULL(ret))
159 dentry = ret;
160
161 status = ocfs2_dentry_attach_lock(dentry, inode,
162 OCFS2_I(dir)->ip_blkno);
163 if (status) {
164 mlog_errno(status);
165 ret = ERR_PTR(status);
166 goto bail_unlock;
167 }
168 } else
169 ocfs2_dentry_attach_gen(dentry);
170
171 bail_unlock:
172 /* Don't drop the cluster lock until *after* the d_add --
173 * unlink on another node will message us to remove that
174 * dentry under this lock so otherwise we can race this with
175 * the downconvert thread and have a stale dentry. */
176 ocfs2_inode_unlock(dir, 0);
177
178 bail:
179
180 trace_ocfs2_lookup_ret(ret);
181
182 return ret;
183 }
184
ocfs2_get_init_inode(struct inode * dir,umode_t mode)185 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
186 {
187 struct inode *inode;
188 int status;
189
190 inode = new_inode(dir->i_sb);
191 if (!inode) {
192 mlog(ML_ERROR, "new_inode failed!\n");
193 return ERR_PTR(-ENOMEM);
194 }
195
196 /* populate as many fields early on as possible - many of
197 * these are used by the support functions here and in
198 * callers. */
199 if (S_ISDIR(mode))
200 set_nlink(inode, 2);
201 mode = mode_strip_sgid(dir, mode);
202 inode_init_owner(inode, dir, mode);
203 status = dquot_initialize(inode);
204 if (status)
205 return ERR_PTR(status);
206
207 return inode;
208 }
209
ocfs2_cleanup_add_entry_failure(struct ocfs2_super * osb,struct dentry * dentry,struct inode * inode)210 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
211 struct dentry *dentry, struct inode *inode)
212 {
213 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
214
215 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
216 ocfs2_lock_res_free(&dl->dl_lockres);
217 BUG_ON(dl->dl_count != 1);
218 spin_lock(&dentry_attach_lock);
219 dentry->d_fsdata = NULL;
220 spin_unlock(&dentry_attach_lock);
221 kfree(dl);
222 iput(inode);
223 }
224
ocfs2_mknod(struct inode * dir,struct dentry * dentry,umode_t mode,dev_t dev)225 static int ocfs2_mknod(struct inode *dir,
226 struct dentry *dentry,
227 umode_t mode,
228 dev_t dev)
229 {
230 int status = 0;
231 struct buffer_head *parent_fe_bh = NULL;
232 handle_t *handle = NULL;
233 struct ocfs2_super *osb;
234 struct ocfs2_dinode *dirfe;
235 struct ocfs2_dinode *fe = NULL;
236 struct buffer_head *new_fe_bh = NULL;
237 struct inode *inode = NULL;
238 struct ocfs2_alloc_context *inode_ac = NULL;
239 struct ocfs2_alloc_context *data_ac = NULL;
240 struct ocfs2_alloc_context *meta_ac = NULL;
241 int want_clusters = 0;
242 int want_meta = 0;
243 int xattr_credits = 0;
244 struct ocfs2_security_xattr_info si = {
245 .name = NULL,
246 .enable = 1,
247 };
248 int did_quota_inode = 0;
249 struct ocfs2_dir_lookup_result lookup = { NULL, };
250 sigset_t oldset;
251 int did_block_signals = 0;
252 struct ocfs2_dentry_lock *dl = NULL;
253
254 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
255 (unsigned long long)OCFS2_I(dir)->ip_blkno,
256 (unsigned long)dev, mode);
257
258 status = dquot_initialize(dir);
259 if (status) {
260 mlog_errno(status);
261 return status;
262 }
263
264 /* get our super block */
265 osb = OCFS2_SB(dir->i_sb);
266
267 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
268 if (status < 0) {
269 if (status != -ENOENT)
270 mlog_errno(status);
271 return status;
272 }
273
274 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
275 status = -EMLINK;
276 goto leave;
277 }
278
279 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
280 if (!ocfs2_read_links_count(dirfe)) {
281 /* can't make a file in a deleted directory. */
282 status = -ENOENT;
283 goto leave;
284 }
285
286 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
287 dentry->d_name.len);
288 if (status)
289 goto leave;
290
291 /* get a spot inside the dir. */
292 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
293 dentry->d_name.name,
294 dentry->d_name.len, &lookup);
295 if (status < 0) {
296 mlog_errno(status);
297 goto leave;
298 }
299
300 /* reserve an inode spot */
301 status = ocfs2_reserve_new_inode(osb, &inode_ac);
302 if (status < 0) {
303 if (status != -ENOSPC)
304 mlog_errno(status);
305 goto leave;
306 }
307
308 inode = ocfs2_get_init_inode(dir, mode);
309 if (IS_ERR(inode)) {
310 status = PTR_ERR(inode);
311 inode = NULL;
312 mlog_errno(status);
313 goto leave;
314 }
315
316 /* get security xattr */
317 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
318 if (status) {
319 if (status == -EOPNOTSUPP)
320 si.enable = 0;
321 else {
322 mlog_errno(status);
323 goto leave;
324 }
325 }
326
327 /* calculate meta data/clusters for setting security and acl xattr */
328 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
329 &si, &want_clusters,
330 &xattr_credits, &want_meta);
331 if (status < 0) {
332 mlog_errno(status);
333 goto leave;
334 }
335
336 /* Reserve a cluster if creating an extent based directory. */
337 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
338 want_clusters += 1;
339
340 /* Dir indexing requires extra space as well */
341 if (ocfs2_supports_indexed_dirs(osb))
342 want_meta++;
343 }
344
345 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
346 if (status < 0) {
347 if (status != -ENOSPC)
348 mlog_errno(status);
349 goto leave;
350 }
351
352 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
353 if (status < 0) {
354 if (status != -ENOSPC)
355 mlog_errno(status);
356 goto leave;
357 }
358
359 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
360 S_ISDIR(mode),
361 xattr_credits));
362 if (IS_ERR(handle)) {
363 status = PTR_ERR(handle);
364 handle = NULL;
365 mlog_errno(status);
366 goto leave;
367 }
368
369 /* Starting to change things, restart is no longer possible. */
370 ocfs2_block_signals(&oldset);
371 did_block_signals = 1;
372
373 status = dquot_alloc_inode(inode);
374 if (status)
375 goto leave;
376 did_quota_inode = 1;
377
378 /* do the real work now. */
379 status = ocfs2_mknod_locked(osb, dir, inode, dev,
380 &new_fe_bh, parent_fe_bh, handle,
381 inode_ac);
382 if (status < 0) {
383 mlog_errno(status);
384 goto leave;
385 }
386
387 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
388 if (S_ISDIR(mode)) {
389 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
390 new_fe_bh, data_ac, meta_ac);
391 if (status < 0) {
392 mlog_errno(status);
393 goto leave;
394 }
395
396 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
397 parent_fe_bh,
398 OCFS2_JOURNAL_ACCESS_WRITE);
399 if (status < 0) {
400 mlog_errno(status);
401 goto leave;
402 }
403 ocfs2_add_links_count(dirfe, 1);
404 ocfs2_journal_dirty(handle, parent_fe_bh);
405 inc_nlink(dir);
406 }
407
408 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
409 meta_ac, data_ac);
410
411 if (status < 0) {
412 mlog_errno(status);
413 goto roll_back;
414 }
415
416 if (si.enable) {
417 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
418 meta_ac, data_ac);
419 if (status < 0) {
420 mlog_errno(status);
421 goto roll_back;
422 }
423 }
424
425 /*
426 * Do this before adding the entry to the directory. We add
427 * also set d_op after success so that ->d_iput() will cleanup
428 * the dentry lock even if ocfs2_add_entry() fails below.
429 */
430 status = ocfs2_dentry_attach_lock(dentry, inode,
431 OCFS2_I(dir)->ip_blkno);
432 if (status) {
433 mlog_errno(status);
434 goto roll_back;
435 }
436
437 dl = dentry->d_fsdata;
438
439 status = ocfs2_add_entry(handle, dentry, inode,
440 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
441 &lookup);
442 if (status < 0) {
443 mlog_errno(status);
444 goto roll_back;
445 }
446
447 insert_inode_hash(inode);
448 d_instantiate(dentry, inode);
449 status = 0;
450
451 roll_back:
452 if (status < 0 && S_ISDIR(mode)) {
453 ocfs2_add_links_count(dirfe, -1);
454 drop_nlink(dir);
455 }
456
457 leave:
458 if (status < 0 && did_quota_inode)
459 dquot_free_inode(inode);
460 if (handle) {
461 if (status < 0 && fe)
462 ocfs2_set_links_count(fe, 0);
463 ocfs2_commit_trans(osb, handle);
464 }
465
466 ocfs2_inode_unlock(dir, 1);
467 if (did_block_signals)
468 ocfs2_unblock_signals(&oldset);
469
470 brelse(new_fe_bh);
471 brelse(parent_fe_bh);
472 kfree(si.value);
473
474 ocfs2_free_dir_lookup_result(&lookup);
475
476 if (inode_ac)
477 ocfs2_free_alloc_context(inode_ac);
478
479 if (data_ac)
480 ocfs2_free_alloc_context(data_ac);
481
482 if (meta_ac)
483 ocfs2_free_alloc_context(meta_ac);
484
485 /*
486 * We should call iput after the i_mutex of the bitmap been
487 * unlocked in ocfs2_free_alloc_context, or the
488 * ocfs2_delete_inode will mutex_lock again.
489 */
490 if ((status < 0) && inode) {
491 if (dl)
492 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
493
494 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
495 clear_nlink(inode);
496 iput(inode);
497 }
498
499 if (status)
500 mlog_errno(status);
501
502 return status;
503 }
504
__ocfs2_mknod_locked(struct inode * dir,struct inode * inode,dev_t dev,struct buffer_head ** new_fe_bh,struct buffer_head * parent_fe_bh,handle_t * handle,struct ocfs2_alloc_context * inode_ac,u64 fe_blkno,u64 suballoc_loc,u16 suballoc_bit)505 static int __ocfs2_mknod_locked(struct inode *dir,
506 struct inode *inode,
507 dev_t dev,
508 struct buffer_head **new_fe_bh,
509 struct buffer_head *parent_fe_bh,
510 handle_t *handle,
511 struct ocfs2_alloc_context *inode_ac,
512 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
513 {
514 int status = 0;
515 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
516 struct ocfs2_dinode *fe = NULL;
517 struct ocfs2_extent_list *fel;
518 u16 feat;
519 struct ocfs2_inode_info *oi = OCFS2_I(inode);
520 struct timespec64 ts;
521
522 *new_fe_bh = NULL;
523
524 /* populate as many fields early on as possible - many of
525 * these are used by the support functions here and in
526 * callers. */
527 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
528 oi->ip_blkno = fe_blkno;
529 spin_lock(&osb->osb_lock);
530 inode->i_generation = osb->s_next_generation++;
531 spin_unlock(&osb->osb_lock);
532
533 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
534 if (!*new_fe_bh) {
535 status = -ENOMEM;
536 mlog_errno(status);
537 goto leave;
538 }
539 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
540
541 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
542 *new_fe_bh,
543 OCFS2_JOURNAL_ACCESS_CREATE);
544 if (status < 0) {
545 mlog_errno(status);
546 goto leave;
547 }
548
549 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
550 memset(fe, 0, osb->sb->s_blocksize);
551
552 fe->i_generation = cpu_to_le32(inode->i_generation);
553 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
554 fe->i_blkno = cpu_to_le64(fe_blkno);
555 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
556 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
557 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
558 fe->i_uid = cpu_to_le32(i_uid_read(inode));
559 fe->i_gid = cpu_to_le32(i_gid_read(inode));
560 fe->i_mode = cpu_to_le16(inode->i_mode);
561 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
562 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
563
564 ocfs2_set_links_count(fe, inode->i_nlink);
565
566 fe->i_last_eb_blk = 0;
567 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
568 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
569 ktime_get_real_ts64(&ts);
570 fe->i_atime = fe->i_ctime = fe->i_mtime =
571 cpu_to_le64(ts.tv_sec);
572 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
573 cpu_to_le32(ts.tv_nsec);
574 fe->i_dtime = 0;
575
576 /*
577 * If supported, directories start with inline data. If inline
578 * isn't supported, but indexing is, we start them as indexed.
579 */
580 feat = le16_to_cpu(fe->i_dyn_features);
581 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
582 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
583
584 fe->id2.i_data.id_count = cpu_to_le16(
585 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
586 } else {
587 fel = &fe->id2.i_list;
588 fel->l_tree_depth = 0;
589 fel->l_next_free_rec = 0;
590 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
591 }
592
593 ocfs2_journal_dirty(handle, *new_fe_bh);
594
595 ocfs2_populate_inode(inode, fe, 1);
596 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
597 if (!ocfs2_mount_local(osb)) {
598 status = ocfs2_create_new_inode_locks(inode);
599 if (status < 0)
600 mlog_errno(status);
601 }
602
603 ocfs2_update_inode_fsync_trans(handle, inode, 1);
604
605 leave:
606 if (status < 0) {
607 if (*new_fe_bh) {
608 brelse(*new_fe_bh);
609 *new_fe_bh = NULL;
610 }
611 }
612
613 if (status)
614 mlog_errno(status);
615 return status;
616 }
617
ocfs2_mknod_locked(struct ocfs2_super * osb,struct inode * dir,struct inode * inode,dev_t dev,struct buffer_head ** new_fe_bh,struct buffer_head * parent_fe_bh,handle_t * handle,struct ocfs2_alloc_context * inode_ac)618 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
619 struct inode *dir,
620 struct inode *inode,
621 dev_t dev,
622 struct buffer_head **new_fe_bh,
623 struct buffer_head *parent_fe_bh,
624 handle_t *handle,
625 struct ocfs2_alloc_context *inode_ac)
626 {
627 int status = 0;
628 u64 suballoc_loc, fe_blkno = 0;
629 u16 suballoc_bit;
630
631 *new_fe_bh = NULL;
632
633 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
634 inode_ac, &suballoc_loc,
635 &suballoc_bit, &fe_blkno);
636 if (status < 0) {
637 mlog_errno(status);
638 return status;
639 }
640
641 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
642 parent_fe_bh, handle, inode_ac,
643 fe_blkno, suballoc_loc, suballoc_bit);
644 }
645
ocfs2_mkdir(struct inode * dir,struct dentry * dentry,umode_t mode)646 static int ocfs2_mkdir(struct inode *dir,
647 struct dentry *dentry,
648 umode_t mode)
649 {
650 int ret;
651
652 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
653 OCFS2_I(dir)->ip_blkno, mode);
654 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
655 if (ret)
656 mlog_errno(ret);
657
658 return ret;
659 }
660
ocfs2_create(struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)661 static int ocfs2_create(struct inode *dir,
662 struct dentry *dentry,
663 umode_t mode,
664 bool excl)
665 {
666 int ret;
667
668 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
669 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
670 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
671 if (ret)
672 mlog_errno(ret);
673
674 return ret;
675 }
676
ocfs2_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)677 static int ocfs2_link(struct dentry *old_dentry,
678 struct inode *dir,
679 struct dentry *dentry)
680 {
681 handle_t *handle;
682 struct inode *inode = d_inode(old_dentry);
683 struct inode *old_dir = d_inode(old_dentry->d_parent);
684 int err;
685 struct buffer_head *fe_bh = NULL;
686 struct buffer_head *old_dir_bh = NULL;
687 struct buffer_head *parent_fe_bh = NULL;
688 struct ocfs2_dinode *fe = NULL;
689 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
690 struct ocfs2_dir_lookup_result lookup = { NULL, };
691 sigset_t oldset;
692 u64 old_de_ino;
693
694 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
695 old_dentry->d_name.len, old_dentry->d_name.name,
696 dentry->d_name.len, dentry->d_name.name);
697
698 if (S_ISDIR(inode->i_mode))
699 return -EPERM;
700
701 err = dquot_initialize(dir);
702 if (err) {
703 mlog_errno(err);
704 return err;
705 }
706
707 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
708 &parent_fe_bh, dir, 0);
709 if (err < 0) {
710 if (err != -ENOENT)
711 mlog_errno(err);
712 return err;
713 }
714
715 /* make sure both dirs have bhs
716 * get an extra ref on old_dir_bh if old==new */
717 if (!parent_fe_bh) {
718 if (old_dir_bh) {
719 parent_fe_bh = old_dir_bh;
720 get_bh(parent_fe_bh);
721 } else {
722 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
723 err = -EIO;
724 goto out;
725 }
726 }
727
728 if (!dir->i_nlink) {
729 err = -ENOENT;
730 goto out;
731 }
732
733 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
734 old_dentry->d_name.len, &old_de_ino);
735 if (err) {
736 err = -ENOENT;
737 goto out;
738 }
739
740 /*
741 * Check whether another node removed the source inode while we
742 * were in the vfs.
743 */
744 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
745 err = -ENOENT;
746 goto out;
747 }
748
749 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
750 dentry->d_name.len);
751 if (err)
752 goto out;
753
754 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
755 dentry->d_name.name,
756 dentry->d_name.len, &lookup);
757 if (err < 0) {
758 mlog_errno(err);
759 goto out;
760 }
761
762 err = ocfs2_inode_lock(inode, &fe_bh, 1);
763 if (err < 0) {
764 if (err != -ENOENT)
765 mlog_errno(err);
766 goto out;
767 }
768
769 fe = (struct ocfs2_dinode *) fe_bh->b_data;
770 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
771 err = -EMLINK;
772 goto out_unlock_inode;
773 }
774
775 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
776 if (IS_ERR(handle)) {
777 err = PTR_ERR(handle);
778 handle = NULL;
779 mlog_errno(err);
780 goto out_unlock_inode;
781 }
782
783 /* Starting to change things, restart is no longer possible. */
784 ocfs2_block_signals(&oldset);
785
786 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
787 OCFS2_JOURNAL_ACCESS_WRITE);
788 if (err < 0) {
789 mlog_errno(err);
790 goto out_commit;
791 }
792
793 inc_nlink(inode);
794 inode->i_ctime = current_time(inode);
795 ocfs2_set_links_count(fe, inode->i_nlink);
796 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
797 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
798 ocfs2_journal_dirty(handle, fe_bh);
799
800 err = ocfs2_add_entry(handle, dentry, inode,
801 OCFS2_I(inode)->ip_blkno,
802 parent_fe_bh, &lookup);
803 if (err) {
804 ocfs2_add_links_count(fe, -1);
805 drop_nlink(inode);
806 mlog_errno(err);
807 goto out_commit;
808 }
809
810 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
811 if (err) {
812 mlog_errno(err);
813 goto out_commit;
814 }
815
816 ihold(inode);
817 d_instantiate(dentry, inode);
818
819 out_commit:
820 ocfs2_commit_trans(osb, handle);
821 ocfs2_unblock_signals(&oldset);
822 out_unlock_inode:
823 ocfs2_inode_unlock(inode, 1);
824
825 out:
826 ocfs2_double_unlock(old_dir, dir);
827
828 brelse(fe_bh);
829 brelse(parent_fe_bh);
830 brelse(old_dir_bh);
831
832 ocfs2_free_dir_lookup_result(&lookup);
833
834 if (err)
835 mlog_errno(err);
836
837 return err;
838 }
839
840 /*
841 * Takes and drops an exclusive lock on the given dentry. This will
842 * force other nodes to drop it.
843 */
ocfs2_remote_dentry_delete(struct dentry * dentry)844 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
845 {
846 int ret;
847
848 ret = ocfs2_dentry_lock(dentry, 1);
849 if (ret)
850 mlog_errno(ret);
851 else
852 ocfs2_dentry_unlock(dentry, 1);
853
854 return ret;
855 }
856
ocfs2_inode_is_unlinkable(struct inode * inode)857 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
858 {
859 if (S_ISDIR(inode->i_mode)) {
860 if (inode->i_nlink == 2)
861 return 1;
862 return 0;
863 }
864
865 if (inode->i_nlink == 1)
866 return 1;
867 return 0;
868 }
869
ocfs2_unlink(struct inode * dir,struct dentry * dentry)870 static int ocfs2_unlink(struct inode *dir,
871 struct dentry *dentry)
872 {
873 int status;
874 int child_locked = 0;
875 bool is_unlinkable = false;
876 struct inode *inode = d_inode(dentry);
877 struct inode *orphan_dir = NULL;
878 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
879 u64 blkno;
880 struct ocfs2_dinode *fe = NULL;
881 struct buffer_head *fe_bh = NULL;
882 struct buffer_head *parent_node_bh = NULL;
883 handle_t *handle = NULL;
884 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
885 struct ocfs2_dir_lookup_result lookup = { NULL, };
886 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
887
888 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
889 dentry->d_name.name,
890 (unsigned long long)OCFS2_I(dir)->ip_blkno,
891 (unsigned long long)OCFS2_I(inode)->ip_blkno);
892
893 status = dquot_initialize(dir);
894 if (status) {
895 mlog_errno(status);
896 return status;
897 }
898
899 BUG_ON(d_inode(dentry->d_parent) != dir);
900
901 if (inode == osb->root_inode)
902 return -EPERM;
903
904 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
905 OI_LS_PARENT);
906 if (status < 0) {
907 if (status != -ENOENT)
908 mlog_errno(status);
909 return status;
910 }
911
912 status = ocfs2_find_files_on_disk(dentry->d_name.name,
913 dentry->d_name.len, &blkno, dir,
914 &lookup);
915 if (status < 0) {
916 if (status != -ENOENT)
917 mlog_errno(status);
918 goto leave;
919 }
920
921 if (OCFS2_I(inode)->ip_blkno != blkno) {
922 status = -ENOENT;
923
924 trace_ocfs2_unlink_noent(
925 (unsigned long long)OCFS2_I(inode)->ip_blkno,
926 (unsigned long long)blkno,
927 OCFS2_I(inode)->ip_flags);
928 goto leave;
929 }
930
931 status = ocfs2_inode_lock(inode, &fe_bh, 1);
932 if (status < 0) {
933 if (status != -ENOENT)
934 mlog_errno(status);
935 goto leave;
936 }
937 child_locked = 1;
938
939 if (S_ISDIR(inode->i_mode)) {
940 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
941 status = -ENOTEMPTY;
942 goto leave;
943 }
944 }
945
946 status = ocfs2_remote_dentry_delete(dentry);
947 if (status < 0) {
948 /* This remote delete should succeed under all normal
949 * circumstances. */
950 mlog_errno(status);
951 goto leave;
952 }
953
954 if (ocfs2_inode_is_unlinkable(inode)) {
955 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
956 OCFS2_I(inode)->ip_blkno,
957 orphan_name, &orphan_insert,
958 false);
959 if (status < 0) {
960 mlog_errno(status);
961 goto leave;
962 }
963 is_unlinkable = true;
964 }
965
966 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
967 if (IS_ERR(handle)) {
968 status = PTR_ERR(handle);
969 handle = NULL;
970 mlog_errno(status);
971 goto leave;
972 }
973
974 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
975 OCFS2_JOURNAL_ACCESS_WRITE);
976 if (status < 0) {
977 mlog_errno(status);
978 goto leave;
979 }
980
981 fe = (struct ocfs2_dinode *) fe_bh->b_data;
982
983 /* delete the name from the parent dir */
984 status = ocfs2_delete_entry(handle, dir, &lookup);
985 if (status < 0) {
986 mlog_errno(status);
987 goto leave;
988 }
989
990 if (S_ISDIR(inode->i_mode))
991 drop_nlink(inode);
992 drop_nlink(inode);
993 ocfs2_set_links_count(fe, inode->i_nlink);
994 ocfs2_journal_dirty(handle, fe_bh);
995
996 dir->i_ctime = dir->i_mtime = current_time(dir);
997 if (S_ISDIR(inode->i_mode))
998 drop_nlink(dir);
999
1000 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1001 if (status < 0) {
1002 mlog_errno(status);
1003 if (S_ISDIR(inode->i_mode))
1004 inc_nlink(dir);
1005 goto leave;
1006 }
1007
1008 if (is_unlinkable) {
1009 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1010 orphan_name, &orphan_insert, orphan_dir, false);
1011 if (status < 0)
1012 mlog_errno(status);
1013 }
1014
1015 leave:
1016 if (handle)
1017 ocfs2_commit_trans(osb, handle);
1018
1019 if (orphan_dir) {
1020 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1021 ocfs2_inode_unlock(orphan_dir, 1);
1022 inode_unlock(orphan_dir);
1023 iput(orphan_dir);
1024 }
1025
1026 if (child_locked)
1027 ocfs2_inode_unlock(inode, 1);
1028
1029 ocfs2_inode_unlock(dir, 1);
1030
1031 brelse(fe_bh);
1032 brelse(parent_node_bh);
1033
1034 ocfs2_free_dir_lookup_result(&orphan_insert);
1035 ocfs2_free_dir_lookup_result(&lookup);
1036
1037 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1038 mlog_errno(status);
1039
1040 return status;
1041 }
1042
ocfs2_check_if_ancestor(struct ocfs2_super * osb,u64 src_inode_no,u64 dest_inode_no)1043 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1044 u64 src_inode_no, u64 dest_inode_no)
1045 {
1046 int ret = 0, i = 0;
1047 u64 parent_inode_no = 0;
1048 u64 child_inode_no = src_inode_no;
1049 struct inode *child_inode;
1050
1051 #define MAX_LOOKUP_TIMES 32
1052 while (1) {
1053 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1054 if (IS_ERR(child_inode)) {
1055 ret = PTR_ERR(child_inode);
1056 break;
1057 }
1058
1059 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1060 if (ret < 0) {
1061 iput(child_inode);
1062 if (ret != -ENOENT)
1063 mlog_errno(ret);
1064 break;
1065 }
1066
1067 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1068 &parent_inode_no);
1069 ocfs2_inode_unlock(child_inode, 0);
1070 iput(child_inode);
1071 if (ret < 0) {
1072 ret = -ENOENT;
1073 break;
1074 }
1075
1076 if (parent_inode_no == dest_inode_no) {
1077 ret = 1;
1078 break;
1079 }
1080
1081 if (parent_inode_no == osb->root_inode->i_ino) {
1082 ret = 0;
1083 break;
1084 }
1085
1086 child_inode_no = parent_inode_no;
1087
1088 if (++i >= MAX_LOOKUP_TIMES) {
1089 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1090 "may have nested directories, "
1091 "src inode: %llu, dest inode: %llu.\n",
1092 (unsigned long long)src_inode_no,
1093 (unsigned long long)dest_inode_no);
1094 ret = 0;
1095 break;
1096 }
1097 }
1098
1099 return ret;
1100 }
1101
1102 /*
1103 * The only place this should be used is rename and link!
1104 * if they have the same id, then the 1st one is the only one locked.
1105 */
ocfs2_double_lock(struct ocfs2_super * osb,struct buffer_head ** bh1,struct inode * inode1,struct buffer_head ** bh2,struct inode * inode2,int rename)1106 static int ocfs2_double_lock(struct ocfs2_super *osb,
1107 struct buffer_head **bh1,
1108 struct inode *inode1,
1109 struct buffer_head **bh2,
1110 struct inode *inode2,
1111 int rename)
1112 {
1113 int status;
1114 int inode1_is_ancestor, inode2_is_ancestor;
1115 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1116 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1117
1118 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1119 (unsigned long long)oi2->ip_blkno);
1120
1121 if (*bh1)
1122 *bh1 = NULL;
1123 if (*bh2)
1124 *bh2 = NULL;
1125
1126 /* we always want to lock the one with the lower lockid first.
1127 * and if they are nested, we lock ancestor first */
1128 if (oi1->ip_blkno != oi2->ip_blkno) {
1129 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1130 oi1->ip_blkno);
1131 if (inode1_is_ancestor < 0) {
1132 status = inode1_is_ancestor;
1133 goto bail;
1134 }
1135
1136 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1137 oi2->ip_blkno);
1138 if (inode2_is_ancestor < 0) {
1139 status = inode2_is_ancestor;
1140 goto bail;
1141 }
1142
1143 if ((inode1_is_ancestor == 1) ||
1144 (oi1->ip_blkno < oi2->ip_blkno &&
1145 inode2_is_ancestor == 0)) {
1146 /* switch id1 and id2 around */
1147 swap(bh2, bh1);
1148 swap(inode2, inode1);
1149 }
1150 /* lock id2 */
1151 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1152 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1153 if (status < 0) {
1154 if (status != -ENOENT)
1155 mlog_errno(status);
1156 goto bail;
1157 }
1158 }
1159
1160 /* lock id1 */
1161 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1162 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1163 if (status < 0) {
1164 /*
1165 * An error return must mean that no cluster locks
1166 * were held on function exit.
1167 */
1168 if (oi1->ip_blkno != oi2->ip_blkno) {
1169 ocfs2_inode_unlock(inode2, 1);
1170 brelse(*bh2);
1171 *bh2 = NULL;
1172 }
1173
1174 if (status != -ENOENT)
1175 mlog_errno(status);
1176 }
1177
1178 trace_ocfs2_double_lock_end(
1179 (unsigned long long)oi1->ip_blkno,
1180 (unsigned long long)oi2->ip_blkno);
1181
1182 bail:
1183 if (status)
1184 mlog_errno(status);
1185 return status;
1186 }
1187
ocfs2_double_unlock(struct inode * inode1,struct inode * inode2)1188 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1189 {
1190 ocfs2_inode_unlock(inode1, 1);
1191
1192 if (inode1 != inode2)
1193 ocfs2_inode_unlock(inode2, 1);
1194 }
1195
ocfs2_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)1196 static int ocfs2_rename(struct inode *old_dir,
1197 struct dentry *old_dentry,
1198 struct inode *new_dir,
1199 struct dentry *new_dentry,
1200 unsigned int flags)
1201 {
1202 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1203 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1204 struct inode *old_inode = d_inode(old_dentry);
1205 struct inode *new_inode = d_inode(new_dentry);
1206 struct inode *orphan_dir = NULL;
1207 struct ocfs2_dinode *newfe = NULL;
1208 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1209 struct buffer_head *newfe_bh = NULL;
1210 struct buffer_head *old_inode_bh = NULL;
1211 struct ocfs2_super *osb = NULL;
1212 u64 newfe_blkno, old_de_ino;
1213 handle_t *handle = NULL;
1214 struct buffer_head *old_dir_bh = NULL;
1215 struct buffer_head *new_dir_bh = NULL;
1216 u32 old_dir_nlink = old_dir->i_nlink;
1217 struct ocfs2_dinode *old_di;
1218 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1219 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1220 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1221 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1222 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1223 bool should_add_orphan = false;
1224
1225 if (flags)
1226 return -EINVAL;
1227
1228 /* At some point it might be nice to break this function up a
1229 * bit. */
1230
1231 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1232 old_dentry->d_name.len, old_dentry->d_name.name,
1233 new_dentry->d_name.len, new_dentry->d_name.name);
1234
1235 status = dquot_initialize(old_dir);
1236 if (status) {
1237 mlog_errno(status);
1238 goto bail;
1239 }
1240 status = dquot_initialize(new_dir);
1241 if (status) {
1242 mlog_errno(status);
1243 goto bail;
1244 }
1245
1246 osb = OCFS2_SB(old_dir->i_sb);
1247
1248 if (new_inode) {
1249 if (!igrab(new_inode))
1250 BUG();
1251 }
1252
1253 /* Assume a directory hierarchy thusly:
1254 * a/b/c
1255 * a/d
1256 * a,b,c, and d are all directories.
1257 *
1258 * from cwd of 'a' on both nodes:
1259 * node1: mv b/c d
1260 * node2: mv d b/c
1261 *
1262 * And that's why, just like the VFS, we need a file system
1263 * rename lock. */
1264 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1265 status = ocfs2_rename_lock(osb);
1266 if (status < 0) {
1267 mlog_errno(status);
1268 goto bail;
1269 }
1270 rename_lock = 1;
1271
1272 /* here we cannot guarantee the inodes haven't just been
1273 * changed, so check if they are nested again */
1274 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1275 old_inode->i_ino);
1276 if (status < 0) {
1277 mlog_errno(status);
1278 goto bail;
1279 } else if (status == 1) {
1280 status = -EPERM;
1281 trace_ocfs2_rename_not_permitted(
1282 (unsigned long long)old_inode->i_ino,
1283 (unsigned long long)new_dir->i_ino);
1284 goto bail;
1285 }
1286 }
1287
1288 /* if old and new are the same, this'll just do one lock. */
1289 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1290 &new_dir_bh, new_dir, 1);
1291 if (status < 0) {
1292 mlog_errno(status);
1293 goto bail;
1294 }
1295 parents_locked = 1;
1296
1297 if (!new_dir->i_nlink) {
1298 status = -EACCES;
1299 goto bail;
1300 }
1301
1302 /* make sure both dirs have bhs
1303 * get an extra ref on old_dir_bh if old==new */
1304 if (!new_dir_bh) {
1305 if (old_dir_bh) {
1306 new_dir_bh = old_dir_bh;
1307 get_bh(new_dir_bh);
1308 } else {
1309 mlog(ML_ERROR, "no old_dir_bh!\n");
1310 status = -EIO;
1311 goto bail;
1312 }
1313 }
1314
1315 /*
1316 * Aside from allowing a meta data update, the locking here
1317 * also ensures that the downconvert thread on other nodes
1318 * won't have to concurrently downconvert the inode and the
1319 * dentry locks.
1320 */
1321 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1322 OI_LS_PARENT);
1323 if (status < 0) {
1324 if (status != -ENOENT)
1325 mlog_errno(status);
1326 goto bail;
1327 }
1328 old_child_locked = 1;
1329
1330 status = ocfs2_remote_dentry_delete(old_dentry);
1331 if (status < 0) {
1332 mlog_errno(status);
1333 goto bail;
1334 }
1335
1336 if (S_ISDIR(old_inode->i_mode)) {
1337 u64 old_inode_parent;
1338
1339 update_dot_dot = 1;
1340 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1341 old_inode,
1342 &old_inode_dot_dot_res);
1343 if (status) {
1344 status = -EIO;
1345 goto bail;
1346 }
1347
1348 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1349 status = -EIO;
1350 goto bail;
1351 }
1352
1353 if (!new_inode && new_dir != old_dir &&
1354 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1355 status = -EMLINK;
1356 goto bail;
1357 }
1358 }
1359
1360 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1361 old_dentry->d_name.len,
1362 &old_de_ino);
1363 if (status) {
1364 status = -ENOENT;
1365 goto bail;
1366 }
1367
1368 /*
1369 * Check for inode number is _not_ due to possible IO errors.
1370 * We might rmdir the source, keep it as pwd of some process
1371 * and merrily kill the link to whatever was created under the
1372 * same name. Goodbye sticky bit ;-<
1373 */
1374 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1375 status = -ENOENT;
1376 goto bail;
1377 }
1378
1379 /* check if the target already exists (in which case we need
1380 * to delete it */
1381 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1382 new_dentry->d_name.len,
1383 &newfe_blkno, new_dir,
1384 &target_lookup_res);
1385 /* The only error we allow here is -ENOENT because the new
1386 * file not existing is perfectly valid. */
1387 if ((status < 0) && (status != -ENOENT)) {
1388 /* If we cannot find the file specified we should just */
1389 /* return the error... */
1390 mlog_errno(status);
1391 goto bail;
1392 }
1393 if (status == 0)
1394 target_exists = 1;
1395
1396 if (!target_exists && new_inode) {
1397 /*
1398 * Target was unlinked by another node while we were
1399 * waiting to get to ocfs2_rename(). There isn't
1400 * anything we can do here to help the situation, so
1401 * bubble up the appropriate error.
1402 */
1403 status = -ENOENT;
1404 goto bail;
1405 }
1406
1407 /* In case we need to overwrite an existing file, we blow it
1408 * away first */
1409 if (target_exists) {
1410 /* VFS didn't think there existed an inode here, but
1411 * someone else in the cluster must have raced our
1412 * rename to create one. Today we error cleanly, in
1413 * the future we should consider calling iget to build
1414 * a new struct inode for this entry. */
1415 if (!new_inode) {
1416 status = -EACCES;
1417
1418 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1419 new_dentry->d_name.name);
1420 goto bail;
1421 }
1422
1423 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1424 status = -EACCES;
1425
1426 trace_ocfs2_rename_disagree(
1427 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1428 (unsigned long long)newfe_blkno,
1429 OCFS2_I(new_inode)->ip_flags);
1430 goto bail;
1431 }
1432
1433 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1434 if (status < 0) {
1435 if (status != -ENOENT)
1436 mlog_errno(status);
1437 goto bail;
1438 }
1439 new_child_locked = 1;
1440
1441 status = ocfs2_remote_dentry_delete(new_dentry);
1442 if (status < 0) {
1443 mlog_errno(status);
1444 goto bail;
1445 }
1446
1447 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1448
1449 trace_ocfs2_rename_over_existing(
1450 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1451 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1452
1453 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1454 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1455 OCFS2_I(new_inode)->ip_blkno,
1456 orphan_name, &orphan_insert,
1457 false);
1458 if (status < 0) {
1459 mlog_errno(status);
1460 goto bail;
1461 }
1462 should_add_orphan = true;
1463 }
1464 } else {
1465 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1466
1467 status = ocfs2_check_dir_for_entry(new_dir,
1468 new_dentry->d_name.name,
1469 new_dentry->d_name.len);
1470 if (status)
1471 goto bail;
1472
1473 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1474 new_dentry->d_name.name,
1475 new_dentry->d_name.len,
1476 &target_insert);
1477 if (status < 0) {
1478 mlog_errno(status);
1479 goto bail;
1480 }
1481 }
1482
1483 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1484 if (IS_ERR(handle)) {
1485 status = PTR_ERR(handle);
1486 handle = NULL;
1487 mlog_errno(status);
1488 goto bail;
1489 }
1490
1491 if (target_exists) {
1492 if (S_ISDIR(new_inode->i_mode)) {
1493 if (new_inode->i_nlink != 2 ||
1494 !ocfs2_empty_dir(new_inode)) {
1495 status = -ENOTEMPTY;
1496 goto bail;
1497 }
1498 }
1499 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1500 newfe_bh,
1501 OCFS2_JOURNAL_ACCESS_WRITE);
1502 if (status < 0) {
1503 mlog_errno(status);
1504 goto bail;
1505 }
1506
1507 /* change the dirent to point to the correct inode */
1508 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1509 old_inode);
1510 if (status < 0) {
1511 mlog_errno(status);
1512 goto bail;
1513 }
1514 inode_inc_iversion(new_dir);
1515
1516 if (S_ISDIR(new_inode->i_mode))
1517 ocfs2_set_links_count(newfe, 0);
1518 else
1519 ocfs2_add_links_count(newfe, -1);
1520 ocfs2_journal_dirty(handle, newfe_bh);
1521 if (should_add_orphan) {
1522 status = ocfs2_orphan_add(osb, handle, new_inode,
1523 newfe_bh, orphan_name,
1524 &orphan_insert, orphan_dir, false);
1525 if (status < 0) {
1526 mlog_errno(status);
1527 goto bail;
1528 }
1529 }
1530 } else {
1531 /* if the name was not found in new_dir, add it now */
1532 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1533 OCFS2_I(old_inode)->ip_blkno,
1534 new_dir_bh, &target_insert);
1535 if (status < 0) {
1536 mlog_errno(status);
1537 goto bail;
1538 }
1539 }
1540
1541 old_inode->i_ctime = current_time(old_inode);
1542 mark_inode_dirty(old_inode);
1543
1544 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1545 old_inode_bh,
1546 OCFS2_JOURNAL_ACCESS_WRITE);
1547 if (status >= 0) {
1548 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1549
1550 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1551 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1552 ocfs2_journal_dirty(handle, old_inode_bh);
1553 } else
1554 mlog_errno(status);
1555
1556 /*
1557 * Now that the name has been added to new_dir, remove the old name.
1558 *
1559 * We don't keep any directory entry context around until now
1560 * because the insert might have changed the type of directory
1561 * we're dealing with.
1562 */
1563 status = ocfs2_find_entry(old_dentry->d_name.name,
1564 old_dentry->d_name.len, old_dir,
1565 &old_entry_lookup);
1566 if (status) {
1567 if (!is_journal_aborted(osb->journal->j_journal)) {
1568 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1569 "is not deleted.",
1570 new_dentry->d_name.len, new_dentry->d_name.name,
1571 old_dentry->d_name.len, old_dentry->d_name.name);
1572 }
1573 goto bail;
1574 }
1575
1576 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1577 if (status < 0) {
1578 mlog_errno(status);
1579 if (!is_journal_aborted(osb->journal->j_journal)) {
1580 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1581 "is not deleted.",
1582 new_dentry->d_name.len, new_dentry->d_name.name,
1583 old_dentry->d_name.len, old_dentry->d_name.name);
1584 }
1585 goto bail;
1586 }
1587
1588 if (new_inode) {
1589 drop_nlink(new_inode);
1590 new_inode->i_ctime = current_time(new_inode);
1591 }
1592 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1593
1594 if (update_dot_dot) {
1595 status = ocfs2_update_entry(old_inode, handle,
1596 &old_inode_dot_dot_res, new_dir);
1597 drop_nlink(old_dir);
1598 if (new_inode) {
1599 drop_nlink(new_inode);
1600 } else {
1601 inc_nlink(new_dir);
1602 mark_inode_dirty(new_dir);
1603 }
1604 }
1605 mark_inode_dirty(old_dir);
1606 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1607 if (new_inode) {
1608 mark_inode_dirty(new_inode);
1609 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1610 }
1611
1612 if (old_dir != new_dir) {
1613 /* Keep the same times on both directories.*/
1614 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1615
1616 /*
1617 * This will also pick up the i_nlink change from the
1618 * block above.
1619 */
1620 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1621 }
1622
1623 if (old_dir_nlink != old_dir->i_nlink) {
1624 if (!old_dir_bh) {
1625 mlog(ML_ERROR, "need to change nlink for old dir "
1626 "%llu from %d to %d but bh is NULL!\n",
1627 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1628 (int)old_dir_nlink, old_dir->i_nlink);
1629 } else {
1630 struct ocfs2_dinode *fe;
1631 status = ocfs2_journal_access_di(handle,
1632 INODE_CACHE(old_dir),
1633 old_dir_bh,
1634 OCFS2_JOURNAL_ACCESS_WRITE);
1635 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1636 ocfs2_set_links_count(fe, old_dir->i_nlink);
1637 ocfs2_journal_dirty(handle, old_dir_bh);
1638 }
1639 }
1640 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1641 status = 0;
1642 bail:
1643 if (handle)
1644 ocfs2_commit_trans(osb, handle);
1645
1646 if (orphan_dir) {
1647 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1648 ocfs2_inode_unlock(orphan_dir, 1);
1649 inode_unlock(orphan_dir);
1650 iput(orphan_dir);
1651 }
1652
1653 if (new_child_locked)
1654 ocfs2_inode_unlock(new_inode, 1);
1655
1656 if (old_child_locked)
1657 ocfs2_inode_unlock(old_inode, 1);
1658
1659 if (parents_locked)
1660 ocfs2_double_unlock(old_dir, new_dir);
1661
1662 if (rename_lock)
1663 ocfs2_rename_unlock(osb);
1664
1665 if (new_inode)
1666 sync_mapping_buffers(old_inode->i_mapping);
1667
1668 iput(new_inode);
1669
1670 ocfs2_free_dir_lookup_result(&target_lookup_res);
1671 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1672 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1673 ocfs2_free_dir_lookup_result(&orphan_insert);
1674 ocfs2_free_dir_lookup_result(&target_insert);
1675
1676 brelse(newfe_bh);
1677 brelse(old_inode_bh);
1678 brelse(old_dir_bh);
1679 brelse(new_dir_bh);
1680
1681 if (status)
1682 mlog_errno(status);
1683
1684 return status;
1685 }
1686
1687 /*
1688 * we expect i_size = strlen(symname). Copy symname into the file
1689 * data, including the null terminator.
1690 */
ocfs2_create_symlink_data(struct ocfs2_super * osb,handle_t * handle,struct inode * inode,const char * symname)1691 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1692 handle_t *handle,
1693 struct inode *inode,
1694 const char *symname)
1695 {
1696 struct buffer_head **bhs = NULL;
1697 const char *c;
1698 struct super_block *sb = osb->sb;
1699 u64 p_blkno, p_blocks;
1700 int virtual, blocks, status, i, bytes_left;
1701
1702 bytes_left = i_size_read(inode) + 1;
1703 /* we can't trust i_blocks because we're actually going to
1704 * write i_size + 1 bytes. */
1705 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1706
1707 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1708 i_size_read(inode), blocks);
1709
1710 /* Sanity check -- make sure we're going to fit. */
1711 if (bytes_left >
1712 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1713 status = -EIO;
1714 mlog_errno(status);
1715 goto bail;
1716 }
1717
1718 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1719 if (!bhs) {
1720 status = -ENOMEM;
1721 mlog_errno(status);
1722 goto bail;
1723 }
1724
1725 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1726 NULL);
1727 if (status < 0) {
1728 mlog_errno(status);
1729 goto bail;
1730 }
1731
1732 /* links can never be larger than one cluster so we know this
1733 * is all going to be contiguous, but do a sanity check
1734 * anyway. */
1735 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1736 status = -EIO;
1737 mlog_errno(status);
1738 goto bail;
1739 }
1740
1741 virtual = 0;
1742 while(bytes_left > 0) {
1743 c = &symname[virtual * sb->s_blocksize];
1744
1745 bhs[virtual] = sb_getblk(sb, p_blkno);
1746 if (!bhs[virtual]) {
1747 status = -ENOMEM;
1748 mlog_errno(status);
1749 goto bail;
1750 }
1751 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1752 bhs[virtual]);
1753
1754 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1755 bhs[virtual],
1756 OCFS2_JOURNAL_ACCESS_CREATE);
1757 if (status < 0) {
1758 mlog_errno(status);
1759 goto bail;
1760 }
1761
1762 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1763
1764 memcpy(bhs[virtual]->b_data, c,
1765 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1766 bytes_left);
1767
1768 ocfs2_journal_dirty(handle, bhs[virtual]);
1769
1770 virtual++;
1771 p_blkno++;
1772 bytes_left -= sb->s_blocksize;
1773 }
1774
1775 status = 0;
1776 bail:
1777
1778 if (bhs) {
1779 for(i = 0; i < blocks; i++)
1780 brelse(bhs[i]);
1781 kfree(bhs);
1782 }
1783
1784 if (status)
1785 mlog_errno(status);
1786 return status;
1787 }
1788
ocfs2_symlink(struct inode * dir,struct dentry * dentry,const char * symname)1789 static int ocfs2_symlink(struct inode *dir,
1790 struct dentry *dentry,
1791 const char *symname)
1792 {
1793 int status, l, credits;
1794 u64 newsize;
1795 struct ocfs2_super *osb = NULL;
1796 struct inode *inode = NULL;
1797 struct super_block *sb;
1798 struct buffer_head *new_fe_bh = NULL;
1799 struct buffer_head *parent_fe_bh = NULL;
1800 struct ocfs2_dinode *fe = NULL;
1801 struct ocfs2_dinode *dirfe;
1802 handle_t *handle = NULL;
1803 struct ocfs2_alloc_context *inode_ac = NULL;
1804 struct ocfs2_alloc_context *data_ac = NULL;
1805 struct ocfs2_alloc_context *xattr_ac = NULL;
1806 int want_clusters = 0;
1807 int xattr_credits = 0;
1808 struct ocfs2_security_xattr_info si = {
1809 .name = NULL,
1810 .enable = 1,
1811 };
1812 int did_quota = 0, did_quota_inode = 0;
1813 struct ocfs2_dir_lookup_result lookup = { NULL, };
1814 sigset_t oldset;
1815 int did_block_signals = 0;
1816 struct ocfs2_dentry_lock *dl = NULL;
1817
1818 trace_ocfs2_symlink_begin(dir, dentry, symname,
1819 dentry->d_name.len, dentry->d_name.name);
1820
1821 status = dquot_initialize(dir);
1822 if (status) {
1823 mlog_errno(status);
1824 goto bail;
1825 }
1826
1827 sb = dir->i_sb;
1828 osb = OCFS2_SB(sb);
1829
1830 l = strlen(symname) + 1;
1831
1832 credits = ocfs2_calc_symlink_credits(sb);
1833
1834 /* lock the parent directory */
1835 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1836 if (status < 0) {
1837 if (status != -ENOENT)
1838 mlog_errno(status);
1839 return status;
1840 }
1841
1842 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1843 if (!ocfs2_read_links_count(dirfe)) {
1844 /* can't make a file in a deleted directory. */
1845 status = -ENOENT;
1846 goto bail;
1847 }
1848
1849 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1850 dentry->d_name.len);
1851 if (status)
1852 goto bail;
1853
1854 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1855 dentry->d_name.name,
1856 dentry->d_name.len, &lookup);
1857 if (status < 0) {
1858 mlog_errno(status);
1859 goto bail;
1860 }
1861
1862 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1863 if (status < 0) {
1864 if (status != -ENOSPC)
1865 mlog_errno(status);
1866 goto bail;
1867 }
1868
1869 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1870 if (IS_ERR(inode)) {
1871 status = PTR_ERR(inode);
1872 inode = NULL;
1873 mlog_errno(status);
1874 goto bail;
1875 }
1876
1877 /* get security xattr */
1878 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1879 if (status) {
1880 if (status == -EOPNOTSUPP)
1881 si.enable = 0;
1882 else {
1883 mlog_errno(status);
1884 goto bail;
1885 }
1886 }
1887
1888 /* calculate meta data/clusters for setting security xattr */
1889 if (si.enable) {
1890 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1891 &xattr_credits, &xattr_ac);
1892 if (status < 0) {
1893 mlog_errno(status);
1894 goto bail;
1895 }
1896 }
1897
1898 /* don't reserve bitmap space for fast symlinks. */
1899 if (l > ocfs2_fast_symlink_chars(sb))
1900 want_clusters += 1;
1901
1902 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1903 if (status < 0) {
1904 if (status != -ENOSPC)
1905 mlog_errno(status);
1906 goto bail;
1907 }
1908
1909 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1910 if (IS_ERR(handle)) {
1911 status = PTR_ERR(handle);
1912 handle = NULL;
1913 mlog_errno(status);
1914 goto bail;
1915 }
1916
1917 /* Starting to change things, restart is no longer possible. */
1918 ocfs2_block_signals(&oldset);
1919 did_block_signals = 1;
1920
1921 status = dquot_alloc_inode(inode);
1922 if (status)
1923 goto bail;
1924 did_quota_inode = 1;
1925
1926 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1927 dentry->d_name.name,
1928 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1929 inode->i_mode);
1930
1931 status = ocfs2_mknod_locked(osb, dir, inode,
1932 0, &new_fe_bh, parent_fe_bh, handle,
1933 inode_ac);
1934 if (status < 0) {
1935 mlog_errno(status);
1936 goto bail;
1937 }
1938
1939 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1940 inode->i_rdev = 0;
1941 newsize = l - 1;
1942 inode->i_op = &ocfs2_symlink_inode_operations;
1943 inode_nohighmem(inode);
1944 if (l > ocfs2_fast_symlink_chars(sb)) {
1945 u32 offset = 0;
1946
1947 status = dquot_alloc_space_nodirty(inode,
1948 ocfs2_clusters_to_bytes(osb->sb, 1));
1949 if (status)
1950 goto bail;
1951 did_quota = 1;
1952 inode->i_mapping->a_ops = &ocfs2_aops;
1953 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1954 new_fe_bh,
1955 handle, data_ac, NULL,
1956 NULL);
1957 if (status < 0) {
1958 if (status != -ENOSPC && status != -EINTR) {
1959 mlog(ML_ERROR,
1960 "Failed to extend file to %llu\n",
1961 (unsigned long long)newsize);
1962 mlog_errno(status);
1963 status = -ENOSPC;
1964 }
1965 goto bail;
1966 }
1967 i_size_write(inode, newsize);
1968 inode->i_blocks = ocfs2_inode_sector_count(inode);
1969 } else {
1970 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1971 memcpy((char *) fe->id2.i_symlink, symname, l);
1972 i_size_write(inode, newsize);
1973 inode->i_blocks = 0;
1974 }
1975
1976 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1977 if (status < 0) {
1978 mlog_errno(status);
1979 goto bail;
1980 }
1981
1982 if (!ocfs2_inode_is_fast_symlink(inode)) {
1983 status = ocfs2_create_symlink_data(osb, handle, inode,
1984 symname);
1985 if (status < 0) {
1986 mlog_errno(status);
1987 goto bail;
1988 }
1989 }
1990
1991 if (si.enable) {
1992 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1993 xattr_ac, data_ac);
1994 if (status < 0) {
1995 mlog_errno(status);
1996 goto bail;
1997 }
1998 }
1999
2000 /*
2001 * Do this before adding the entry to the directory. We add
2002 * also set d_op after success so that ->d_iput() will cleanup
2003 * the dentry lock even if ocfs2_add_entry() fails below.
2004 */
2005 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2006 if (status) {
2007 mlog_errno(status);
2008 goto bail;
2009 }
2010
2011 dl = dentry->d_fsdata;
2012
2013 status = ocfs2_add_entry(handle, dentry, inode,
2014 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2015 &lookup);
2016 if (status < 0) {
2017 mlog_errno(status);
2018 goto bail;
2019 }
2020
2021 insert_inode_hash(inode);
2022 d_instantiate(dentry, inode);
2023 bail:
2024 if (status < 0 && did_quota)
2025 dquot_free_space_nodirty(inode,
2026 ocfs2_clusters_to_bytes(osb->sb, 1));
2027 if (status < 0 && did_quota_inode)
2028 dquot_free_inode(inode);
2029 if (handle) {
2030 if (status < 0 && fe)
2031 ocfs2_set_links_count(fe, 0);
2032 ocfs2_commit_trans(osb, handle);
2033 }
2034
2035 ocfs2_inode_unlock(dir, 1);
2036 if (did_block_signals)
2037 ocfs2_unblock_signals(&oldset);
2038
2039 brelse(new_fe_bh);
2040 brelse(parent_fe_bh);
2041 kfree(si.value);
2042 ocfs2_free_dir_lookup_result(&lookup);
2043 if (inode_ac)
2044 ocfs2_free_alloc_context(inode_ac);
2045 if (data_ac)
2046 ocfs2_free_alloc_context(data_ac);
2047 if (xattr_ac)
2048 ocfs2_free_alloc_context(xattr_ac);
2049 if ((status < 0) && inode) {
2050 if (dl)
2051 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2052
2053 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2054 clear_nlink(inode);
2055 iput(inode);
2056 }
2057
2058 if (status)
2059 mlog_errno(status);
2060
2061 return status;
2062 }
2063
ocfs2_blkno_stringify(u64 blkno,char * name)2064 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2065 {
2066 int status, namelen;
2067
2068 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2069 (long long)blkno);
2070 if (namelen <= 0) {
2071 if (namelen)
2072 status = namelen;
2073 else
2074 status = -EINVAL;
2075 mlog_errno(status);
2076 goto bail;
2077 }
2078 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2079 status = -EINVAL;
2080 mlog_errno(status);
2081 goto bail;
2082 }
2083
2084 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2085
2086 status = 0;
2087 bail:
2088 if (status < 0)
2089 mlog_errno(status);
2090 return status;
2091 }
2092
ocfs2_lookup_lock_orphan_dir(struct ocfs2_super * osb,struct inode ** ret_orphan_dir,struct buffer_head ** ret_orphan_dir_bh)2093 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2094 struct inode **ret_orphan_dir,
2095 struct buffer_head **ret_orphan_dir_bh)
2096 {
2097 struct inode *orphan_dir_inode;
2098 struct buffer_head *orphan_dir_bh = NULL;
2099 int ret = 0;
2100
2101 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2102 ORPHAN_DIR_SYSTEM_INODE,
2103 osb->slot_num);
2104 if (!orphan_dir_inode) {
2105 ret = -ENOENT;
2106 mlog_errno(ret);
2107 return ret;
2108 }
2109
2110 inode_lock(orphan_dir_inode);
2111
2112 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2113 if (ret < 0) {
2114 inode_unlock(orphan_dir_inode);
2115 iput(orphan_dir_inode);
2116
2117 mlog_errno(ret);
2118 return ret;
2119 }
2120
2121 *ret_orphan_dir = orphan_dir_inode;
2122 *ret_orphan_dir_bh = orphan_dir_bh;
2123
2124 return 0;
2125 }
2126
__ocfs2_prepare_orphan_dir(struct inode * orphan_dir_inode,struct buffer_head * orphan_dir_bh,u64 blkno,char * name,struct ocfs2_dir_lookup_result * lookup,bool dio)2127 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2128 struct buffer_head *orphan_dir_bh,
2129 u64 blkno,
2130 char *name,
2131 struct ocfs2_dir_lookup_result *lookup,
2132 bool dio)
2133 {
2134 int ret;
2135 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2136 int namelen = dio ?
2137 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2138 OCFS2_ORPHAN_NAMELEN;
2139
2140 if (dio) {
2141 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2142 OCFS2_DIO_ORPHAN_PREFIX);
2143 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2144 ret = -EINVAL;
2145 mlog_errno(ret);
2146 return ret;
2147 }
2148
2149 ret = ocfs2_blkno_stringify(blkno,
2150 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2151 } else
2152 ret = ocfs2_blkno_stringify(blkno, name);
2153 if (ret < 0) {
2154 mlog_errno(ret);
2155 return ret;
2156 }
2157
2158 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2159 orphan_dir_bh, name,
2160 namelen, lookup);
2161 if (ret < 0) {
2162 mlog_errno(ret);
2163 return ret;
2164 }
2165
2166 return 0;
2167 }
2168
2169 /**
2170 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2171 * insertion of an orphan.
2172 * @osb: ocfs2 file system
2173 * @ret_orphan_dir: Orphan dir inode - returned locked!
2174 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2175 * @lookup: dir lookup result, to be passed back into functions like
2176 * ocfs2_orphan_add
2177 *
2178 * Returns zero on success and the ret_orphan_dir, name and lookup
2179 * fields will be populated.
2180 *
2181 * Returns non-zero on failure.
2182 */
ocfs2_prepare_orphan_dir(struct ocfs2_super * osb,struct inode ** ret_orphan_dir,u64 blkno,char * name,struct ocfs2_dir_lookup_result * lookup,bool dio)2183 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2184 struct inode **ret_orphan_dir,
2185 u64 blkno,
2186 char *name,
2187 struct ocfs2_dir_lookup_result *lookup,
2188 bool dio)
2189 {
2190 struct inode *orphan_dir_inode = NULL;
2191 struct buffer_head *orphan_dir_bh = NULL;
2192 int ret = 0;
2193
2194 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2195 &orphan_dir_bh);
2196 if (ret < 0) {
2197 mlog_errno(ret);
2198 return ret;
2199 }
2200
2201 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2202 blkno, name, lookup, dio);
2203 if (ret < 0) {
2204 mlog_errno(ret);
2205 goto out;
2206 }
2207
2208 *ret_orphan_dir = orphan_dir_inode;
2209
2210 out:
2211 brelse(orphan_dir_bh);
2212
2213 if (ret) {
2214 ocfs2_inode_unlock(orphan_dir_inode, 1);
2215 inode_unlock(orphan_dir_inode);
2216 iput(orphan_dir_inode);
2217 }
2218
2219 if (ret)
2220 mlog_errno(ret);
2221 return ret;
2222 }
2223
ocfs2_orphan_add(struct ocfs2_super * osb,handle_t * handle,struct inode * inode,struct buffer_head * fe_bh,char * name,struct ocfs2_dir_lookup_result * lookup,struct inode * orphan_dir_inode,bool dio)2224 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2225 handle_t *handle,
2226 struct inode *inode,
2227 struct buffer_head *fe_bh,
2228 char *name,
2229 struct ocfs2_dir_lookup_result *lookup,
2230 struct inode *orphan_dir_inode,
2231 bool dio)
2232 {
2233 struct buffer_head *orphan_dir_bh = NULL;
2234 int status = 0;
2235 struct ocfs2_dinode *orphan_fe;
2236 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2237 int namelen = dio ?
2238 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2239 OCFS2_ORPHAN_NAMELEN;
2240
2241 trace_ocfs2_orphan_add_begin(
2242 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2243
2244 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2245 if (status < 0) {
2246 mlog_errno(status);
2247 goto leave;
2248 }
2249
2250 status = ocfs2_journal_access_di(handle,
2251 INODE_CACHE(orphan_dir_inode),
2252 orphan_dir_bh,
2253 OCFS2_JOURNAL_ACCESS_WRITE);
2254 if (status < 0) {
2255 mlog_errno(status);
2256 goto leave;
2257 }
2258
2259 /*
2260 * We're going to journal the change of i_flags and i_orphaned_slot.
2261 * It's safe anyway, though some callers may duplicate the journaling.
2262 * Journaling within the func just make the logic look more
2263 * straightforward.
2264 */
2265 status = ocfs2_journal_access_di(handle,
2266 INODE_CACHE(inode),
2267 fe_bh,
2268 OCFS2_JOURNAL_ACCESS_WRITE);
2269 if (status < 0) {
2270 mlog_errno(status);
2271 goto leave;
2272 }
2273
2274 /* we're a cluster, and nlink can change on disk from
2275 * underneath us... */
2276 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2277 if (S_ISDIR(inode->i_mode))
2278 ocfs2_add_links_count(orphan_fe, 1);
2279 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2280 ocfs2_journal_dirty(handle, orphan_dir_bh);
2281
2282 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2283 namelen, inode,
2284 OCFS2_I(inode)->ip_blkno,
2285 orphan_dir_bh, lookup);
2286 if (status < 0) {
2287 mlog_errno(status);
2288 goto rollback;
2289 }
2290
2291 if (dio) {
2292 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2293 * slot.
2294 */
2295 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2296 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2297 } else {
2298 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2299 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2300
2301 /* Record which orphan dir our inode now resides
2302 * in. delete_inode will use this to determine which orphan
2303 * dir to lock. */
2304 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2305 }
2306
2307 ocfs2_journal_dirty(handle, fe_bh);
2308
2309 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2310 osb->slot_num);
2311
2312 rollback:
2313 if (status < 0) {
2314 if (S_ISDIR(inode->i_mode))
2315 ocfs2_add_links_count(orphan_fe, -1);
2316 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2317 }
2318
2319 leave:
2320 brelse(orphan_dir_bh);
2321
2322 return status;
2323 }
2324
2325 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
ocfs2_orphan_del(struct ocfs2_super * osb,handle_t * handle,struct inode * orphan_dir_inode,struct inode * inode,struct buffer_head * orphan_dir_bh,bool dio)2326 int ocfs2_orphan_del(struct ocfs2_super *osb,
2327 handle_t *handle,
2328 struct inode *orphan_dir_inode,
2329 struct inode *inode,
2330 struct buffer_head *orphan_dir_bh,
2331 bool dio)
2332 {
2333 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2334 struct ocfs2_dinode *orphan_fe;
2335 int status = 0;
2336 struct ocfs2_dir_lookup_result lookup = { NULL, };
2337
2338 if (dio) {
2339 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2340 OCFS2_DIO_ORPHAN_PREFIX);
2341 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2342 status = -EINVAL;
2343 mlog_errno(status);
2344 return status;
2345 }
2346
2347 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2348 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2349 } else
2350 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2351 if (status < 0) {
2352 mlog_errno(status);
2353 goto leave;
2354 }
2355
2356 trace_ocfs2_orphan_del(
2357 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2358 name, strlen(name));
2359
2360 status = ocfs2_journal_access_di(handle,
2361 INODE_CACHE(orphan_dir_inode),
2362 orphan_dir_bh,
2363 OCFS2_JOURNAL_ACCESS_WRITE);
2364 if (status < 0) {
2365 mlog_errno(status);
2366 goto leave;
2367 }
2368
2369 /* find it's spot in the orphan directory */
2370 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2371 &lookup);
2372 if (status) {
2373 mlog_errno(status);
2374 goto leave;
2375 }
2376
2377 /* remove it from the orphan directory */
2378 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2379 if (status < 0) {
2380 mlog_errno(status);
2381 goto leave;
2382 }
2383
2384 /* do the i_nlink dance! :) */
2385 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2386 if (S_ISDIR(inode->i_mode))
2387 ocfs2_add_links_count(orphan_fe, -1);
2388 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2389 ocfs2_journal_dirty(handle, orphan_dir_bh);
2390
2391 leave:
2392 ocfs2_free_dir_lookup_result(&lookup);
2393
2394 if (status)
2395 mlog_errno(status);
2396 return status;
2397 }
2398
2399 /**
2400 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2401 * allocated file. This is different from the typical 'add to orphan dir'
2402 * operation in that the inode does not yet exist. This is a problem because
2403 * the orphan dir stringifies the inode block number to come up with it's
2404 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2405 * problem. This function works around it by calling deeper into the orphan
2406 * and suballoc code than other callers. Use this only by necessity.
2407 * @dir: The directory which this inode will ultimately wind up under - not the
2408 * orphan dir!
2409 * @dir_bh: buffer_head the @dir inode block
2410 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2411 * with the string to be used for orphan dirent. Pass back to the orphan dir
2412 * code.
2413 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2414 * dir code.
2415 * @ret_di_blkno: block number where the new inode will be allocated.
2416 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2417 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2418 *
2419 * Returns zero on success and the ret_orphan_dir, name and lookup
2420 * fields will be populated.
2421 *
2422 * Returns non-zero on failure.
2423 */
ocfs2_prep_new_orphaned_file(struct inode * dir,struct buffer_head * dir_bh,char * orphan_name,struct inode ** ret_orphan_dir,u64 * ret_di_blkno,struct ocfs2_dir_lookup_result * orphan_insert,struct ocfs2_alloc_context ** ret_inode_ac)2424 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2425 struct buffer_head *dir_bh,
2426 char *orphan_name,
2427 struct inode **ret_orphan_dir,
2428 u64 *ret_di_blkno,
2429 struct ocfs2_dir_lookup_result *orphan_insert,
2430 struct ocfs2_alloc_context **ret_inode_ac)
2431 {
2432 int ret;
2433 u64 di_blkno;
2434 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2435 struct inode *orphan_dir = NULL;
2436 struct buffer_head *orphan_dir_bh = NULL;
2437 struct ocfs2_alloc_context *inode_ac = NULL;
2438
2439 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2440 if (ret < 0) {
2441 mlog_errno(ret);
2442 return ret;
2443 }
2444
2445 /* reserve an inode spot */
2446 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2447 if (ret < 0) {
2448 if (ret != -ENOSPC)
2449 mlog_errno(ret);
2450 goto out;
2451 }
2452
2453 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2454 &di_blkno);
2455 if (ret) {
2456 mlog_errno(ret);
2457 goto out;
2458 }
2459
2460 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2461 di_blkno, orphan_name, orphan_insert,
2462 false);
2463 if (ret < 0) {
2464 mlog_errno(ret);
2465 goto out;
2466 }
2467
2468 out:
2469 if (ret == 0) {
2470 *ret_orphan_dir = orphan_dir;
2471 *ret_di_blkno = di_blkno;
2472 *ret_inode_ac = inode_ac;
2473 /*
2474 * orphan_name and orphan_insert are already up to
2475 * date via prepare_orphan_dir
2476 */
2477 } else {
2478 /* Unroll reserve_new_inode* */
2479 if (inode_ac)
2480 ocfs2_free_alloc_context(inode_ac);
2481
2482 /* Unroll orphan dir locking */
2483 inode_unlock(orphan_dir);
2484 ocfs2_inode_unlock(orphan_dir, 1);
2485 iput(orphan_dir);
2486 }
2487
2488 brelse(orphan_dir_bh);
2489
2490 return ret;
2491 }
2492
ocfs2_create_inode_in_orphan(struct inode * dir,int mode,struct inode ** new_inode)2493 int ocfs2_create_inode_in_orphan(struct inode *dir,
2494 int mode,
2495 struct inode **new_inode)
2496 {
2497 int status, did_quota_inode = 0;
2498 struct inode *inode = NULL;
2499 struct inode *orphan_dir = NULL;
2500 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2501 handle_t *handle = NULL;
2502 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2503 struct buffer_head *parent_di_bh = NULL;
2504 struct buffer_head *new_di_bh = NULL;
2505 struct ocfs2_alloc_context *inode_ac = NULL;
2506 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2507 u64 di_blkno, suballoc_loc;
2508 u16 suballoc_bit;
2509
2510 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2511 if (status < 0) {
2512 if (status != -ENOENT)
2513 mlog_errno(status);
2514 return status;
2515 }
2516
2517 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2518 orphan_name, &orphan_dir,
2519 &di_blkno, &orphan_insert, &inode_ac);
2520 if (status < 0) {
2521 if (status != -ENOSPC)
2522 mlog_errno(status);
2523 goto leave;
2524 }
2525
2526 inode = ocfs2_get_init_inode(dir, mode);
2527 if (IS_ERR(inode)) {
2528 status = PTR_ERR(inode);
2529 inode = NULL;
2530 mlog_errno(status);
2531 goto leave;
2532 }
2533
2534 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2535 if (IS_ERR(handle)) {
2536 status = PTR_ERR(handle);
2537 handle = NULL;
2538 mlog_errno(status);
2539 goto leave;
2540 }
2541
2542 status = dquot_alloc_inode(inode);
2543 if (status)
2544 goto leave;
2545 did_quota_inode = 1;
2546
2547 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2548 &suballoc_loc,
2549 &suballoc_bit, di_blkno);
2550 if (status < 0) {
2551 mlog_errno(status);
2552 goto leave;
2553 }
2554
2555 clear_nlink(inode);
2556 /* do the real work now. */
2557 status = __ocfs2_mknod_locked(dir, inode,
2558 0, &new_di_bh, parent_di_bh, handle,
2559 inode_ac, di_blkno, suballoc_loc,
2560 suballoc_bit);
2561 if (status < 0) {
2562 mlog_errno(status);
2563 goto leave;
2564 }
2565
2566 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2567 &orphan_insert, orphan_dir, false);
2568 if (status < 0) {
2569 mlog_errno(status);
2570 goto leave;
2571 }
2572
2573 /* get open lock so that only nodes can't remove it from orphan dir. */
2574 status = ocfs2_open_lock(inode);
2575 if (status < 0)
2576 mlog_errno(status);
2577
2578 insert_inode_hash(inode);
2579 leave:
2580 if (status < 0 && did_quota_inode)
2581 dquot_free_inode(inode);
2582 if (handle)
2583 ocfs2_commit_trans(osb, handle);
2584
2585 if (orphan_dir) {
2586 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2587 ocfs2_inode_unlock(orphan_dir, 1);
2588 inode_unlock(orphan_dir);
2589 iput(orphan_dir);
2590 }
2591
2592 if ((status < 0) && inode) {
2593 clear_nlink(inode);
2594 iput(inode);
2595 }
2596
2597 if (inode_ac)
2598 ocfs2_free_alloc_context(inode_ac);
2599
2600 brelse(new_di_bh);
2601
2602 if (!status)
2603 *new_inode = inode;
2604
2605 ocfs2_free_dir_lookup_result(&orphan_insert);
2606
2607 ocfs2_inode_unlock(dir, 1);
2608 brelse(parent_di_bh);
2609 return status;
2610 }
2611
ocfs2_add_inode_to_orphan(struct ocfs2_super * osb,struct inode * inode)2612 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2613 struct inode *inode)
2614 {
2615 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2616 struct inode *orphan_dir_inode = NULL;
2617 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2618 struct buffer_head *di_bh = NULL;
2619 int status = 0;
2620 handle_t *handle = NULL;
2621 struct ocfs2_dinode *di = NULL;
2622
2623 status = ocfs2_inode_lock(inode, &di_bh, 1);
2624 if (status < 0) {
2625 mlog_errno(status);
2626 goto bail;
2627 }
2628
2629 di = (struct ocfs2_dinode *) di_bh->b_data;
2630 /*
2631 * Another append dio crashed?
2632 * If so, manually recover it first.
2633 */
2634 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2635 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2636 if (status < 0) {
2637 if (status != -ENOSPC)
2638 mlog_errno(status);
2639 goto bail_unlock_inode;
2640 }
2641
2642 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2643 if (status < 0) {
2644 mlog_errno(status);
2645 goto bail_unlock_inode;
2646 }
2647 }
2648
2649 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2650 OCFS2_I(inode)->ip_blkno,
2651 orphan_name,
2652 &orphan_insert,
2653 true);
2654 if (status < 0) {
2655 mlog_errno(status);
2656 goto bail_unlock_inode;
2657 }
2658
2659 handle = ocfs2_start_trans(osb,
2660 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2661 if (IS_ERR(handle)) {
2662 status = PTR_ERR(handle);
2663 goto bail_unlock_orphan;
2664 }
2665
2666 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2667 &orphan_insert, orphan_dir_inode, true);
2668 if (status)
2669 mlog_errno(status);
2670
2671 ocfs2_commit_trans(osb, handle);
2672
2673 bail_unlock_orphan:
2674 ocfs2_inode_unlock(orphan_dir_inode, 1);
2675 inode_unlock(orphan_dir_inode);
2676 iput(orphan_dir_inode);
2677
2678 ocfs2_free_dir_lookup_result(&orphan_insert);
2679
2680 bail_unlock_inode:
2681 ocfs2_inode_unlock(inode, 1);
2682 brelse(di_bh);
2683
2684 bail:
2685 return status;
2686 }
2687
ocfs2_del_inode_from_orphan(struct ocfs2_super * osb,struct inode * inode,struct buffer_head * di_bh,int update_isize,loff_t end)2688 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2689 struct inode *inode, struct buffer_head *di_bh,
2690 int update_isize, loff_t end)
2691 {
2692 struct inode *orphan_dir_inode = NULL;
2693 struct buffer_head *orphan_dir_bh = NULL;
2694 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2695 handle_t *handle = NULL;
2696 int status = 0;
2697
2698 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2699 ORPHAN_DIR_SYSTEM_INODE,
2700 le16_to_cpu(di->i_dio_orphaned_slot));
2701 if (!orphan_dir_inode) {
2702 status = -ENOENT;
2703 mlog_errno(status);
2704 goto bail;
2705 }
2706
2707 inode_lock(orphan_dir_inode);
2708 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2709 if (status < 0) {
2710 inode_unlock(orphan_dir_inode);
2711 iput(orphan_dir_inode);
2712 mlog_errno(status);
2713 goto bail;
2714 }
2715
2716 handle = ocfs2_start_trans(osb,
2717 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2718 if (IS_ERR(handle)) {
2719 status = PTR_ERR(handle);
2720 goto bail_unlock_orphan;
2721 }
2722
2723 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2724
2725 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2726 inode, orphan_dir_bh, true);
2727 if (status < 0) {
2728 mlog_errno(status);
2729 goto bail_commit;
2730 }
2731
2732 status = ocfs2_journal_access_di(handle,
2733 INODE_CACHE(inode),
2734 di_bh,
2735 OCFS2_JOURNAL_ACCESS_WRITE);
2736 if (status < 0) {
2737 mlog_errno(status);
2738 goto bail_commit;
2739 }
2740
2741 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2742 di->i_dio_orphaned_slot = 0;
2743
2744 if (update_isize) {
2745 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2746 if (status)
2747 mlog_errno(status);
2748 } else
2749 ocfs2_journal_dirty(handle, di_bh);
2750
2751 bail_commit:
2752 ocfs2_commit_trans(osb, handle);
2753
2754 bail_unlock_orphan:
2755 ocfs2_inode_unlock(orphan_dir_inode, 1);
2756 inode_unlock(orphan_dir_inode);
2757 brelse(orphan_dir_bh);
2758 iput(orphan_dir_inode);
2759
2760 bail:
2761 return status;
2762 }
2763
ocfs2_mv_orphaned_inode_to_new(struct inode * dir,struct inode * inode,struct dentry * dentry)2764 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2765 struct inode *inode,
2766 struct dentry *dentry)
2767 {
2768 int status = 0;
2769 struct buffer_head *parent_di_bh = NULL;
2770 handle_t *handle = NULL;
2771 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2772 struct ocfs2_dinode *dir_di, *di;
2773 struct inode *orphan_dir_inode = NULL;
2774 struct buffer_head *orphan_dir_bh = NULL;
2775 struct buffer_head *di_bh = NULL;
2776 struct ocfs2_dir_lookup_result lookup = { NULL, };
2777
2778 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2779 dentry->d_name.len, dentry->d_name.name,
2780 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2781 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2782
2783 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2784 if (status < 0) {
2785 if (status != -ENOENT)
2786 mlog_errno(status);
2787 return status;
2788 }
2789
2790 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2791 if (!dir_di->i_links_count) {
2792 /* can't make a file in a deleted directory. */
2793 status = -ENOENT;
2794 goto leave;
2795 }
2796
2797 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2798 dentry->d_name.len);
2799 if (status)
2800 goto leave;
2801
2802 /* get a spot inside the dir. */
2803 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2804 dentry->d_name.name,
2805 dentry->d_name.len, &lookup);
2806 if (status < 0) {
2807 mlog_errno(status);
2808 goto leave;
2809 }
2810
2811 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2812 ORPHAN_DIR_SYSTEM_INODE,
2813 osb->slot_num);
2814 if (!orphan_dir_inode) {
2815 status = -ENOENT;
2816 mlog_errno(status);
2817 goto leave;
2818 }
2819
2820 inode_lock(orphan_dir_inode);
2821
2822 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2823 if (status < 0) {
2824 mlog_errno(status);
2825 inode_unlock(orphan_dir_inode);
2826 iput(orphan_dir_inode);
2827 goto leave;
2828 }
2829
2830 status = ocfs2_read_inode_block(inode, &di_bh);
2831 if (status < 0) {
2832 mlog_errno(status);
2833 goto orphan_unlock;
2834 }
2835
2836 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2837 if (IS_ERR(handle)) {
2838 status = PTR_ERR(handle);
2839 handle = NULL;
2840 mlog_errno(status);
2841 goto orphan_unlock;
2842 }
2843
2844 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2845 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2846 if (status < 0) {
2847 mlog_errno(status);
2848 goto out_commit;
2849 }
2850
2851 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2852 orphan_dir_bh, false);
2853 if (status < 0) {
2854 mlog_errno(status);
2855 goto out_commit;
2856 }
2857
2858 di = (struct ocfs2_dinode *)di_bh->b_data;
2859 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2860 di->i_orphaned_slot = 0;
2861 set_nlink(inode, 1);
2862 ocfs2_set_links_count(di, inode->i_nlink);
2863 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2864 ocfs2_journal_dirty(handle, di_bh);
2865
2866 status = ocfs2_add_entry(handle, dentry, inode,
2867 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2868 &lookup);
2869 if (status < 0) {
2870 mlog_errno(status);
2871 goto out_commit;
2872 }
2873
2874 status = ocfs2_dentry_attach_lock(dentry, inode,
2875 OCFS2_I(dir)->ip_blkno);
2876 if (status) {
2877 mlog_errno(status);
2878 goto out_commit;
2879 }
2880
2881 d_instantiate(dentry, inode);
2882 status = 0;
2883 out_commit:
2884 ocfs2_commit_trans(osb, handle);
2885 orphan_unlock:
2886 ocfs2_inode_unlock(orphan_dir_inode, 1);
2887 inode_unlock(orphan_dir_inode);
2888 iput(orphan_dir_inode);
2889 leave:
2890
2891 ocfs2_inode_unlock(dir, 1);
2892
2893 brelse(di_bh);
2894 brelse(parent_di_bh);
2895 brelse(orphan_dir_bh);
2896
2897 ocfs2_free_dir_lookup_result(&lookup);
2898
2899 if (status)
2900 mlog_errno(status);
2901
2902 return status;
2903 }
2904
2905 const struct inode_operations ocfs2_dir_iops = {
2906 .create = ocfs2_create,
2907 .lookup = ocfs2_lookup,
2908 .link = ocfs2_link,
2909 .unlink = ocfs2_unlink,
2910 .rmdir = ocfs2_unlink,
2911 .symlink = ocfs2_symlink,
2912 .mkdir = ocfs2_mkdir,
2913 .mknod = ocfs2_mknod,
2914 .rename = ocfs2_rename,
2915 .setattr = ocfs2_setattr,
2916 .getattr = ocfs2_getattr,
2917 .permission = ocfs2_permission,
2918 .listxattr = ocfs2_listxattr,
2919 .fiemap = ocfs2_fiemap,
2920 .get_acl = ocfs2_iop_get_acl,
2921 .set_acl = ocfs2_iop_set_acl,
2922 };
2923